You will need a safely-filtered solar telescope. You can either use a typical white-light filter (e.g., Baader Turbo Solar film) or a purpose-built solar telescope like those for hydrogen alpha, Ca-K, and the like.
These satellites are geostationary. So, unlike other satellites transiting the Sun (which can pass completely across the solar disc in a fraction of a section), you will have several seconds to spot them.
If you do not have a solar filter, another safe way to view the sun is to project its disc onto a white card behind the eyepiece. How safe this is depends on the type of telescope and its aperture. Since all the wavelengths are passing through the telescope, and the eyepiece is magnifying the image as well as projecting it, things are going to get very hot. I would not recommend this with a telescope of more than a couple inches aperture, or with a premium eyepiece.
You must remember to never look directly at the Sun through an unfiltered telescope, or an improperly-filtered one.
And if someone else is with you, take care that they don't either accidentally or purposely look at the Sun.
Remember to cover your finder scope, as well.
Whether you can actually see the satellite also depends on its size and distance. I have imaged satellites transiting the solar disc and if I hadn't known precisely when to look I never would have noticed them.
The universe is not only stranger than we imagine, it's stranger than we CAN imagine. --- JBS Haldane
Come visit me at Comanche Springs Astronomy Campus (we're on Google Maps) in Texas.